Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal

doi:10.1029/2018GC008100

	Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal
	Wang, Shishun 1; Chang, Liao 1,2; Xue, Pengfei 1; Liu, Shengfa 2,3; Shi, Xuefa 2,3; Khokiattiwong, Somkiat 4; Kornkanitnan, Narumol 5; Liu, Jianxing 2,3
刊名	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
	2019-06
卷号	20 期号:6 页码:2559-2571
关键词	paleomagnetic secular variation relative paleointensity excursion marine sediments Bengal
ISSN号	1525-2027
DOI	10.1029/2018GC008100
英文摘要	Paleomagnetic secular variations in South Asia are not well understood due to insufficient records. In this study, we produce a new paleomagnetic secular variation curve covering the past 40,000 years by stacking four marine sediment records from the middle portion of Bay of Bengal. Age models are based on radiocarbon dating and core correlation. Stepwise alternating field demagnetization was used to isolate the primary remanent component. Rock magnetic measurements indicate that the primary magnetic remanence carriers are single domain and pseudo-single domain magnetites with no sign of diagenetic alteration. Our Bengal relative paleointensity stack is broadly consistent with local records and the PISO-1500 relative paleointensity stack (Channell et al., 2009; ). Two geomagnetic excursions presented by paleointensity minima are recognized, which correlate to the Mono Lake (29-32 ka) and Laschamp excursion (38-40 ka), respectively. We conclude that the Mono Lake and Laschamp excursion are two separate events.
资助项目	National Natural Science Foundation of China[41574060] ; National Natural Science Foundation of China[41722402] ; National Natural Science Foundation of China[41676054] ; National Natural Science Foundation of China[U1606401]
WOS关键词	LASCHAMP GEOMAGNETIC EXCURSION ; MONO LAKE EXCURSION ; VARIATION RECORD ; ICELAND BASIN ; FIELD ; SEA ; AGE ; SEDIMENTS ; MAGNETITE ; CURVES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000477582400001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24586]
专题	自然资源部第一海洋研究所
通讯作者	Chang, Liao; Shi, Xuefa
作者单位	1.Peking Univ, Sch Earth & Space Sci, Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Shandong, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Shandong, Peoples R China 4.Phuket Marine Biol Ctr, Phuket, Thailand 5.Marine & Coastal Resource Res Ctr, Samut Sakhon, Thailand
推荐引用方式 GB/T 7714	Wang, Shishun,Chang, Liao,Xue, Pengfei,et al. Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(6):2559-2571.
APA	Wang, Shishun.,Chang, Liao.,Xue, Pengfei.,Liu, Shengfa.,Shi, Xuefa.,...&Liu, Jianxing.(2019).Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(6),2559-2571.
MLA	Wang, Shishun,et al."Paleomagnetic Secular Variations During the Past 40,000 Years From the Bay of Bengal".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.6(2019):2559-2571.